Required fields on Customer module

The minimum by default fields required to add a customer are:

1. Form of contact

2. First Name

3. Last Name

4. At least one phone number

5. Email

TIP: If you do not have your client's phone or email, you can enter your business's email or phone number.

You can set other fields as required from: Setup -> Required Fields

IMPORTANT!! If you customize other required fields, you MUST complete all fields when adding a client. If you are adding a client and you notice that the information is not being saved or if it is asking you for other fields it means you have customized the "Required Fields" section.